Overheating issues
Discussion
Not been on here for awhile as all has been good in TVR world. However, went for a drive on the hottest day of the year, and whilst parked in gridlock, noticed increase on temp gauge. Normally, my car is fixed smacked bang in the middle of the
Gauge with no fluctuation. Anyway, turns out fan is not coming on. So, I have done some quick checks, I have put a fly lead across the pins on the otter switch (if that's what it is called) with engine running. I was hoping this would switch the fan on, but nothing. Does this indicate a broken fan?
Can't get anywhere near to fan to check it. I assume the bonnet needs to come off for that!
Thanks for any guidance.
Gauge with no fluctuation. Anyway, turns out fan is not coming on. So, I have done some quick checks, I have put a fly lead across the pins on the otter switch (if that's what it is called) with engine running. I was hoping this would switch the fan on, but nothing. Does this indicate a broken fan?
Can't get anywhere near to fan to check it. I assume the bonnet needs to come off for that!
Thanks for any guidance.
Sandgrounder said:
I have put a fly lead across the pins on the otter switch (if that's what it is called) with engine running.
You need to join the two wires together, not the connections on the switch?My car has the fan on the "air on" side of the radiator but there are some connections to it near the crossmember that supports the swirl pot, near the horns, that are prone to corrosion and general failure
Good advice Gents. I took a few photos, but haven't got the IT skill to get them off my phone onto this laptop, particularly as my mate has just loaded Windows 10 onto it last night.
Anyway, I dropped the fuse box into passenger footwell, and straight away noticed a molten mass of plastic where a 25 amp fuse used to be. I pulled it out and replaced it. Then took the wires off the otter switch and joined them together, ignition on, and the fan sparked into life!!.
Don't know what caused the fuse to melt, so will need to keep an eye on it, but car now back in action.
Strangely, despite condition of the fuse, once I scraped some carbon off one of the pins, it still had continuity!!
The unsurprising thing was that this 25 amp fuse is not allocated to anything according to the bible for S3's, but I keep hearing that TVR wiring is a law unto itself.
So, for now, all is sorted. Thanks to all for the help.
Anyway, I dropped the fuse box into passenger footwell, and straight away noticed a molten mass of plastic where a 25 amp fuse used to be. I pulled it out and replaced it. Then took the wires off the otter switch and joined them together, ignition on, and the fan sparked into life!!.
Don't know what caused the fuse to melt, so will need to keep an eye on it, but car now back in action.
Strangely, despite condition of the fuse, once I scraped some carbon off one of the pins, it still had continuity!!
The unsurprising thing was that this 25 amp fuse is not allocated to anything according to the bible for S3's, but I keep hearing that TVR wiring is a law unto itself.
So, for now, all is sorted. Thanks to all for the help.
Evening all. Well, I've not been using my TVR much lately, but it has been ok temperature wise while I have used it. Unfortunately, this weekend, I got stuck in a traffic jam near home, and the temp gauge started rising again.
Got home, popped the bonnet, alas no sound of fan spinning. So in a bad mood, just put the car away in garage, and as soon as switched ignition off, volcanic eruption of coolant on the garage floor.
So, I would imagine fuse is melted again, but didn't check. Assuming it has, does this indicate a problem with the fan, drawing too much current? Electrics are not my speciality as you can probably tell.
I know I will have to take the bonnet off to even see the fan, but don't want to swap it unless I know that is the problem. Is there anything else to consider before fan transplant? Is there a check I can do on the fan to see if it is faulty?
Thanks
Got home, popped the bonnet, alas no sound of fan spinning. So in a bad mood, just put the car away in garage, and as soon as switched ignition off, volcanic eruption of coolant on the garage floor.
So, I would imagine fuse is melted again, but didn't check. Assuming it has, does this indicate a problem with the fan, drawing too much current? Electrics are not my speciality as you can probably tell.
I know I will have to take the bonnet off to even see the fan, but don't want to swap it unless I know that is the problem. Is there anything else to consider before fan transplant? Is there a check I can do on the fan to see if it is faulty?
Thanks
Woah, step away from removing the bonnet.
I had the same problem.
The fan connects to the loom just underneath the cross member, there is a two pin plug which I suspect is your problem, chop this off and run clean wires to the battery for testing.
I thought my plug looked ok until I had it on the bench:
I too had been nursing it in traffic for the year, swapped it for
A choc block (it and all the tools require had been in the boot sinve I've owned the car) it's fine now.
Which reminds me I must swap that for a real plug...
I had the same problem.
The fan connects to the loom just underneath the cross member, there is a two pin plug which I suspect is your problem, chop this off and run clean wires to the battery for testing.
I thought my plug looked ok until I had it on the bench:
I too had been nursing it in traffic for the year, swapped it for
A choc block (it and all the tools require had been in the boot sinve I've owned the car) it's fine now.
Which reminds me I must swap that for a real plug...
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